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Old 19th Apr 2001, 13:17
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Wilfred
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Question High Altitude Stall

The books say that the stall speed increases with altitude. Have I got the reason right?

1/2RhoV2SCl. For a stall in a given configuration, S will remain the same, and Cl(a combination of wing shape and incidence) will be the same. Stall always occurs at a certain incidence. So if air density (1/2Rho) decreases with altitude, then the airspeed at the stall would have to be higher to balance the equation.

Please can you put me straight folks.